1
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chalkboard
2
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chalk
3
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eraser
4
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teacher
5
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student
6
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chair
7
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book
8
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desk
9
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paper
10
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pen
11
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pencil
12
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notebooks
13
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computer
14
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stand
15
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sit
16
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talk
17
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raise...hand
18
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open a notebook
19
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close window
20
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look at the screen
21
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work at the computer
22
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listen
23
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read
24
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come in
25
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go out
26
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point to
27
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write